251530552 has 64 divisors (see below), whose sum is σ = 588530880. Its totient is φ = 98122752.

The previous prime is 251530523. The next prime is 251530567. The reversal of 251530552 is 255035152.

251530552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 251530552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50778 + ... + 55510.

It is an arithmetic number, because the mean of its divisors is an integer number (9195795).

Almost surely, 2^251530552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251530552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294265440).

251530552 is an abundant number, since it is smaller than the sum of its proper divisors (337000328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251530552 is a wasteful number, since it uses less digits than its factorization.

251530552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4832 (or 4828 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 251530552 is about 15859.7147515332. The cubic root of 251530552 is about 631.2434934205.

The spelling of 251530552 in words is "two hundred fifty-one million, five hundred thirty thousand, five hundred fifty-two".